Engine type?

I just recently saw a video on this. The axial engine, which is currently being prototyped and such by Duke Engines. I was thinking that maybe it could be part of some DLC in the future, that is if the engines actually make it to a production stage and are used. Just thought I would share it with you guys here because while its not a typical design it's not as radical as some others and seems quite up to par performance wise with modern engines. Well here's a video showing and there are plenty more out there on YouTube.
http://youtu.be/c19kn3drdFU
http://youtu.be/c19kn3drdFU